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Head gasket replacement - any sealant ?
shadejo
post Aug 27 2010 - 11:08 AM
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Repairing a Smart engine that had cylinder head issues, and I am about to put the head back on.

I have the new head gasket, but am wondering if any sealant is required on it? Normally I would have expected not (most engines I have done previously are very specific not to use any sealant) but the old gasket and block surfaces had small traces of a thin clear sealant (looked like very thin RTV or similar) that were present. I cleaned this all off the block and head, but wondered if there is a sealant recommended, as the gasket itself does not appear to have the copper or tin "sealing rings" around the cylinders.

Any one with access to the WIS or experience on this able to advise ?

Many thanks !
John
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bilgladstone
post Aug 27 2010 - 02:17 PM
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This is my smart. There are many like it, but this one is mine.


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Hi John,

I've asked a smart specialist in UK and I'll forward his reply.

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fordnut71
post Aug 27 2010 - 05:19 PM
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chances are the silcone your seeing is from the gasket itself. most head gaskets now have a silcone in the gasket itself to seal up around cooling jackets.
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shadejo
post Aug 27 2010 - 05:59 PM
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QUOTE (bilgladstone @ Aug 27 2010 - 02:17 PM) *
Hi John,

I've asked a smart specialist in UK and I'll forward his reply.

Bil sun.gif

Thanks Bil !

Fordnut71's reply makes sense, given the very thin nature of what I took off the block but I'll feel better with confirmation from a specialist.

Cheers
John
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bilgladstone
post Aug 31 2010 - 02:55 AM
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This is my smart. There are many like it, but this one is mine.


Group: Regular Members
Posts: 12,116
Joined: Jun 12th, 05
From: Kelowna, BC
Member No.: 95



OK... heard back from Mike at Smart Car Specialist Ltd www.smartcarspecialist.co.uk who do LOTS of smart engine rebuilds and this is what they use.
QUOTE
We would recommend something like well seal http://shop.ebay.co.uk/items/wellseal?_dmd...4=265031_265051

Throw away gloves after use, do not get it on your skin as it does not come off, apply light film both side of the gasket and smear until it covers the surfaces completely, it does NOT dry, do not get it on anything you want to keep!

Regards
Mike :-)
Smart Car Specialist Ltd
www.smartcarspecialist.co.uk
07738 247 233 Sasho
07760 768 331 Mike
01483 578 748 Unit
Passionate About Smarts
QUOTE
Well Seal:
Developed by Rolls Royce Ltd and manufactured under license, this compound is the complete answer to sealing problems on machined faces.
  1. withstands temperatures up to 195C (383F)
  2. Non-flammable
  3. Easy Partability
  4. Non-hardening

HTH,
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shadejo
post Sep 2 2010 - 02:51 PM
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QUOTE (bilgladstone @ Aug 31 2010 - 02:55 AM) *
OK... heard back from Mike at Smart Car Specialist Ltd www.smartcarspecialist.co.uk who do LOTS of smart engine rebuilds and this is what they use.

HTH,
Bil senile.gif

Many thanks Bil !

John

This post has been edited by shadejo: Sep 2 2010 - 02:51 PM
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